Science writer Richard Preston talks about some of the most enormous living beings on the planet, the giant trees of the US Pacific Northwest. Growing from a tiny seed, they support vast ecosystems — and are still, largely, a mystery.

Richard Preston wrote The Hot Zone, a classic look at the Ebola virus and the scientists who fight it. His wide-ranging curiosity about science and people has led him to cover a dizzying list of topics, with a lapidary attention to detail and an ear for the human voice.
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